HS-SPME/GC-MS	headspace solid-phase microextraction tandem gas chromatography–mass spectrometry
HS-SPME	headspace solid-phase microextraction
VOCs	Volatile organic compounds
TPC	Total phenolic content
TFC	Total flavonoid content
DPPH	2,2-diphenyl-1-picrylhydrazyl
ABTS	2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)
CCA	Crustose coralline algae
DVB/CAR/PDMS	divinylbenzene/carboxen/polydimethylsiloxane
PTFE	Polytetrafluoroethylene
DMSP	Dimethylsulphoniopropionate
DMS	Dimethyl sulphide
SD	Standard deviation
C. webbiana	Caulerpa webbiana
A. Taxiformis	Asparagopsis taxiformis
R. okamurae	Rugulopteryx okamurae
mgGAE/100 g DW	milligrams of gallic acid equivalents per 100 g of dry weight
mgQE/100 g DW	milligrams of quercetin equivalents per 100 g of dry weight
mgTE/100 g DW	milligrams of trolox equivalents per 100 g of dry weight
PLS-DA	Partial Least Squares–Discriminant Analysis
HCA	Hierarchical Cluster Analysis
PC1	Principal component 1
PC2	Principal component 2
RT	Retention time
KIcalc	calculated Kovat index relative n-alkanes
kIlit	literature Kovat index
VIP	Variable Importance in Projection